期刊
ACS EARTH AND SPACE CHEMISTRY
卷 3, 期 7, 页码 1189-1195出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsearthspacechem.9b00055
关键词
vinyl alcohol; complex organic molecules; star-forming regions; spectroscopy; ISM; pyrolysis
资金
- Bologna University (RFO funds)
- Ministry of Education, Universities and Research (MIUR, Project PRIN 2015: STARS in the CAOS) [2015F59J3R]
- STARS in the CAOS [2015F59J3R]
- National Aeronautics and Space Administration (NASA) through Hubble Fellowship [HST-HF2-51396]
- Space Telescope Science Institute [NAS5-26555]
We report an extension toward the submillimeter domain of the laboratory spectroscopy of the syn and anti conformers of vinyl alcohol, a species that has been detected once in the interstellar medium, in the massive star-forming region Sagittarius B2(N) (Turner, B. E.; Apponi, A. Microwave detection of interstellar vinyl alcohol, CH2CHOH. Astrophys. J. 2001, 561, L207-L210, 10.1086/324762). Spectra were recorded with high accuracy (1520 kHz) between 245 and 310 GHz by a frequency-modulation spectrometer equipped with a pyrolysis cell. Using these spectra and the refined molecular constants, we have searched for vinyl alcohol in the publicly available spectral line surveys from the ASAI [Astrochemical Surveys at Institut de Radioastronomie Millimetrique (IRAM)] Large Project, whose source sample spans the evolutionary range of a solar-type protostar and covering 75350 GHz (41 mm) in frequency. We report non-detections in all nine sources, derive upper limits to the abundance of both conformers of vinyl alcohol, and comment on possible chemical and physical explanations for the non-detections.
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